Temperature sensitive shape memory polymer is a kind of shape memory material. In its structure， there are fixed phases that remember the initial shape and reversible phases that can be cured and softened reversibly with temperature. In this paper， these properties of materials are applied to the cementing field of petroleum engineering. The temperature sensitive deformation characteristics of temperature sensitive polymer allows the particle deformation to be excited at high downhole temperature to form a large deformation， which provides a bridge structure for sealing and plugging the lost circulation layer； thus， solving the problems of poor leakage prevention and plugging effect of cementing slurry， and inability of the cement truck to pump large particles. The initial particle size of the temperature sensitive plugging material is 1mm. After reaching the temperature sensitive point， it deforms and expands in volume. The application temperature is 60 to 140℃， and the dosage is 0 to 2%BWOC； The temperature sensitive plugging cement slurry system prepared on these conditions can effectively seal the 2mm slotted plate at 7MPa. The temperature sensitive plugging cement slurry has been applied in North-209 well， North-8 well and North-213-1 well for cementing of the liner or oil bearing layers by the Northeast oil and gas branch company successively， especially in North 213-1 well where it effectively solved the problem of cementing leakage.